John f



7 parts in each of the drawings.

of the concave recess, said recess being made Unirrnn STATES PATENTOrricn.

JOHN F. GAFFEY AND GEORGE WV. COOK, OF NE\V HAVEN, CONN.

RIFLE-SIGHT.

EPECIFICILTION forming part of Letters Patent No. 290,225,

dated December 18, 1883.

Application filed November 5, 1883. (No model.)

1'0 all whom it may concern.-

Be it known that we, JOHN F. GAFFEY and GEORGE \V. COOK. citizens of theUnited States, residing at New Haven, in the county of New Haven andState of Connecticut, have invented certain new and useful Improvementsin Rifle-Sights, of which the following is a specification, referencebeing had therein to the accompanying drawings, in which- Figure l is aside elevation of our improved rifle-sight, in which a sectional view ofthe base is also given on line :0 m, Fig. 7. Fig. 2 is a face View ofthe improved rifle-sight complete. Fig. 3 is a perspective view of aportion of the sight-leaf, having the combination sight-block attachedthereto. Fig. 9 represents the remaining portion of the sight-leaf inperspective, and was detached, as shown, to facilitate placing all theviews upon one sheet. Figs. 4, 5, 6, 7, 8, 10, and 11 are views ofdetailed parts,.fully described hereinafter.

Letters of like name and kind refer to like The design of our inventionis to increase the efficiency of the rifle-sight, and render morecertain and accurate the operation of the mechanism in wind-gage sights;and to this end it consists of a rifle-sight in which the shaft uponwhich the sight-leaf operates is adapted to be adjusted laterally withthe longitudinal axis of the rifle-barrel, and securely iiXed upon anypoint desired by suitable checknuts.

It consists, further, in a rifle-sight having a combination sight-blockfixed upon the sightleaf, and adapted to be moved in a vertical planethereupon.

It consists, further, in a rifle-sight provided with graduations uponthe combination sightblock and sight-leaf, operating in conjunction toform both avernier and ordinary sight scale.

It consists, finally, of the construction and arrangement of the parts,substantially as and for the purpose hereinafter shown and described.

In the annexed drawings, A represents a combination sight-block providedwith a rectangular opening, upon the lower side of which is anopen-sight notch, a, and directly above this rectangular opening, in thecenter in the block A, is a small aperture, Z), to be used as apeep-sight. This combination sight-block A has the form shown in Fig. 4,which gives an end and side elevation of the sight-bloclgshowing theshoulder d and projection c, the projection 0 being provided with ascrew-thread, upon which the nut eis adapted to operate. The shoulder atis made to fit the slot in the leaf B, having a depthless than thethickness of the said leaf, as shown by broken linesin Fig. 1, providingan open space between the block Aand nut 6 when the nut is screwedagainst theleaf B, as in Fig. 1, thereby clamping the sight-block A atany desired point on the leaf B. The leaf B is provided with a graduatedscale upon one edge, the subdivisions of which, in connection withsuitable graduations on the side of the sight-block A, arranged oppositethe peep-sight b, operate as a Vernier-scale for the adjustment of thesightblock A when using the peep-sight b. A single line is placedopposite the notch a, which operates, in connection with the samesubdivisions on leaf B, as an ordinary elevating scale.

Fig. 7 is a plan of the base-plate D, which is provided with two uprightlugs, i and 2', each lug having a hole, h, which corresponds in diameterwith the pin F. This base-plate D is properly recessed on the underside, to permit the fiat spring E being placed therein and havesufficient space to operate. The spring E is secured to the base-plate Dby the screw 3 at one end, as in Fig. 1, while the other end, beingfree, is bent in an upward curve, and is adapted to fit into the groove9.

Figs. 10 and 11 represent the two parts into which the pin F is divided.I11 Fig. 11 the size of the pin is reduced at r to correspond with thediameter of the hole at in the hub of the leaf B, and serves as ajournal, upon which the leaf B operates when being elevated for use. At.9 still another reduction in the size of the pin F is made, andprovided with a suitable thread, to enable it being screwed into theinternally-threaded hole, a, Fig. 10,

.as shown. A screw-thread is placed upon each end of the pin F, uponwhich the checknuts 0 and C operate. 0 and 0 are graduations on the pinF, by which the lateral adjustment of the leaf B is measured. When theparts are in the position shown in Fig. 2, it is obvious that if it isdesired to move the leaf B to the right, unscrewing the check-nut O andtightening up 0 will cause the pin F to be moved longitudinally to theright, carrying the leaf B with it to the right. By a reversal of theoperation theleaf B will be moved to the left, and this adjustment ismeasured by the graduation-lines 0 and 0.

A great advantage gained by our improved sight is that whenever the leafB is closed down upon the gun, which is invariably the case when thesight is not in use, and again elevated for use, no change of positionof the leaf B and appurtenant sight-block A in relation to the line ofsight upon which it was last adjusted is incurred, as the leaf Boperates upon the smooth journal 9", and the pin F is held firmly inposition by the cheek-nuts G and C.

\Ve have shown in the drawings a sight which is adapted to beingattached to the wrist or grip of the stock in the rear of therifle-barrehwhieh requires the leaf B, when elevated for use, to standat an angle of more than ninety degrees with the base-plate D. Thedifference in the vertical position of the leaf B may be regulated bythe position of the projection f on the lug '5, against which the leaf Bis firmly held, when elevated for use, by the peculiar end of the springE interlocking in the groove 9, as shown in Fig. 1.

Having described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

In a gun-sight, the combination of the movable sight-block A, having theopen-sight notch a and peep-sight aperture b, with the slotted leaf B,provided with the elevating scale, as described, and the pin F, havingthe graduations 0 and 0 and adjusting cheek-nuts G and C, the pin Fbeing adapted to a longitudinal movement through the lugs i and t on thebase-plate D, together with the spring E, groove "0, and projeetionf,all substantially as and for the purpose set forth.

In testimony whereof we affix our signatures in presence of twowitnesses.

JOHN F. GAFFEY. GEORGE \V. COOK.

\Vitnesses LoUIs S. DAY, JOHN WV. TAYLOR.

